mleszcz

### Keybase proof

I hereby claim:

  * I am mleszcz on github.
  * I am mleszcz (https://keybase.io/mleszcz) on keybase.
  * I have a public key ASCZE_hZlnjIFOuQHvjMzpp63fLHg3UmfX97F1A7g8H0_Ao

To claim this, I am signing this object:

mleszcz

set :capose_file, ["docker-compose.yml"]
set :capose_commands, ["run --rm app bundle install", "up -d"]

mleszcz

version: '3'
services:
  db:
    image: postgres
    volumes:
      - postgres-data:/var/lib/postgresql/data
  app: &app
    build: .
    image: some-app
    command: bundle exec rails s -p 3000 -b '0.0.0.0'

mleszcz

#
# Test the app before deployment
#
desc "Check if the application is releasable => run tests"
before :deploy, :test_app do
  unless system("bundle install") &&
         system("bundle exec rake db:drop db:create db:migrate db:seed") &&
         system("bundle exec rake")
    puts "===> FIX SPECS AND RETRY <==="    
    exit

mleszcz

Auto-Deploying via Travis CI

Because Travis CI can automatically execute scripts after successfully (or unsuccessfully!) executing tests, it is an obvious choice for a deployment tool. In order to deploy to a Git repository on a remote server, the process generally is as follows:

• Set up SSH keys
• Add the server's copy of the repository as a Git remote
• Push to the remote
• SSH into the server and execute any installation/compilation/miscellaneous commands

Before even touching .travis.yml...

Users

mleszcz

# higher level
class Copy
  def self.call(reader, writer)
    writer.call(reader.call)
  end
end

# lower level
Copy.call(WriteToSSD, ReadFromSSD)

mleszcz

# higher level
class Copy
  def self.call(reader, writer)
    writer.call(reader.call)
  end
end

# lower level
Copy.call(WriteToHDD, ReadFromHDD)

mleszcz

# higher level
class Copy
  def self.call
    WriteToSSD.call(ReadFromSSD.call)
  end
end

# lower level
Copy.call

mleszcz

# higher level
class Copy
  def self.call
    WriteToHDD.call(ReadFromHDD.call)
  end
end

# lower level
Copy.call

mleszcz

shapes = [ Rectangle.new, Square.new ]
shapes.each { |shape| shape.set_width(100) }